Petroleum-oil composition



Patented June 28, 1927.

ALBERT A. SOMEBVILLE, or FLUSHING,

R. '1. VANDERBILT COMPANY, moon]? TION OF NEW YORK.

NEW YORK, ASSIGNOR OF TWO-THIRDS TO ORATED, OF NEW YORK, N. Y., A CORPORA- PETBOLEUM-OIL COMPOSITION.

No Drawing.

This invention relates to improvements in petroleum oil compositions. More particularly, the invention relates to improved petroleum oil compositions adapted for use at high temperatures and having improved stability when so used. The new petroleum oil compositions are valuable for use for lubricating purposes and also in transformers or oil switches or for other electrical purposes including cable insulation.

Whenrmineral oil lubricants are used in internal combustion engines, the high temperature to which the oils are subjected results in more or less rapid deterioration with loss of lubricating properties, particularly where air comes in contact with the oils at the same time that they are subjected to heat and the oils undergo more or less decomposition, with the attendant formation of carbon or sludge-like ingredients. So also when lubricating oils are used under air pressures as in air compressors, a great deal of trouble is often experienced due to the lubricating oil gumming after a few days use. Similarly, when hydrocarbon oils are used in transformers or for cable impregnation, where the oil is subjected to an elevated temperature for prolonged periods of time, it undergoes or tends to undergo deterioration, particularly in its electrical properties, so that the oil would have to be removed and replaced at more or less frequent intervals, e. g., in transformers or in the saturating bath used for impregnating the wrappings of cables.

The present invention provides an improved oil composition which can be used for prolonged periods of time as compared with ordinary oil compositions, and which is stabilized so that it will resist deterioration during use at high temperatures. The improved oil compositions can also be used at lower temperatures where they are subjected during use to oxidation, with resultin' tendency toward deterioration, as where su jected to air pressure in air compressors,

etc.

According to the present invention, the lubricating oil or transformer oil or cable impregnating oil or grease etc. has com- Application filed June 19, 1926. Serial No. 117,191.

pounded therewith a small amount of paraamido-phenol which serves as a stabilizing agent to retard or prevent deterioration at high temperatures.

In the case of lubricating oil compositions, the lubricating oil may be the same as or 5 similar to lubricating oils now commonly used at high temperatures, such as in gas engines and internal combustion engines, or such as are used at lower temperatures under an pressure as in air compressors. The oils 60 may vary from light lubricating oils to heavier lubricating oils. In general, these oils are hydrocarbon oils, although they may have small amounts of vegetable or animal oils compounded therewith.

In the case of transformer oils or cable saturating oils or greases, the oil or grease may be of the kind commonly used for such purposes with the stabilizing agent added thereto. 7

The amount of the para-amido-phenol which itis necessary to add is small. In general, a few per cent at most will sufiice, and as little as a fraction of a per cent may be sufiicient, e. g., 0.5% or less up to about 7 1%. The invention will be further illustrated by the following specific example but it is intended and will be understood that the invention is not limited thereto.

A lubricating oil composition'such as is 30 commonly used for the lubrication of an automobile engine has'added thereto a small amount, e. .g., 0.5% to 1% of para-amido phenol. The resulting lubricating oil composition W111 have improved stability and res1stance to decomposition at elevated temperatures. 7

In a similar manner, a mineral oil composition such as is commonly used for impregnating the paper or cloth wrappings of cables may have a-similar amount of. paraamido-phenol added thereto. When the resulting composition is used for saturating the wrapping of cables, by passing the cable through the hot saturating bath, the bath will retain hi h insulating properties .for long periods 0 time.

In a similar manner, oils such asare used for transformers or for electrical switches, etc., can be similarly treated with a small amount of para-amido-phenol.

I claim:

1. An improved petroleum oil composition comprising petroleum oil having combined therewith a small amount of para-amidophenol.

2. An improved petroleum oil composition having improved electrical properties 10 comprising an oil suitable for electrical purposes having incorporated therewith a small amount of para-amido-phenol.

In testimony whereof I affix my signature.

ALBERT A. SOMERVILLE. 

